EP0184603A1 - Procédé de préparation d'une pâte duvet - Google Patents

Procédé de préparation d'une pâte duvet Download PDF

Info

Publication number
EP0184603A1
EP0184603A1 EP84850382A EP84850382A EP0184603A1 EP 0184603 A1 EP0184603 A1 EP 0184603A1 EP 84850382 A EP84850382 A EP 84850382A EP 84850382 A EP84850382 A EP 84850382A EP 0184603 A1 EP0184603 A1 EP 0184603A1
Authority
EP
European Patent Office
Prior art keywords
pulp
debonding
tensides
value
tenside
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP84850382A
Other languages
German (de)
English (en)
Inventor
Nikolaus Schönfeldt
Curt Parck
Sven Hakansson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korsnas Marma AB
Original Assignee
Korsnas Marma AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Korsnas Marma AB filed Critical Korsnas Marma AB
Priority to EP84850382A priority Critical patent/EP0184603A1/fr
Publication of EP0184603A1 publication Critical patent/EP0184603A1/fr
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/48—Surfactants
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/06—Controlling the addition
    • D21H23/08—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH

Definitions

  • This invention refers to a process in preparing a high absorption fluff pulp from a pulp suspension on a pulp-drying machine,"wherein,to improve fiberizing,to the pulp suspension before or on the wire is added a debonding agent and optionally, to improve the absorption, an absorption promoting agent.
  • fluff produced by dry fiberizing of fluff pulp such as cellulose pulp in the form of web rolls or pulp bales,for absorbent media in sanitary products such as diapers and sanitary napkins.
  • Fluff pulp is conventionally prepared on a pulp drying machine having a wet-end comprising a wire and a press section and a drying section.
  • the pulp before or on the wire can be provided with certain additives which reduce the bonding and the friction between the fibres in the pulp.
  • debonding agents it should, however, be observed that they can have an injurious effect on the remaining characteristics of the fluff which are desirable in technical use, for instance fluid absorption time, high brightness, high bulk and good elasticity characteristics.
  • Cationic tensides remain cationic both in alkaline and acid environment.
  • the tendency to make the fibres hydrophobic could then only be compensated for by, as stated above, mixing with an absorption promoting agent, such as a nonionic tenside.
  • a process in preparing a high absorption fluff pulp is characterized in that the debonding agent is an ampholytic tenside and/or a tenside, which depending on the pH value is cationic or nonionic, said tenside(s); is added in an amount of 0.01-2% by weight based on the dry weight of the pulp suspension, the pH value of the pulp suspension at the addition is kept sufficiently low for the tenside(s) to be in cationic form, one or more absorption promoting agents is added, if required, and the pH value of the pulp after dewatering on the wire is increased to such an extent that the debonding tenside(s) is tranferred into the anionic and nonionic form respectively.
  • the debonding agent is an ampholytic tenside and/or a tenside, which depending on the pH value is cationic or nonionic, said tenside(s); is added in an amount of 0.01-2% by weight based on the dry weight of the pulp suspension, the pH value of the pulp
  • Suitable absorption promoting agents are anionic tensides and nonionic tensides.
  • straight or branched aliphatic alcohols having at least 8 carbon atoms in the alkyl chain, carboxylic amides with at least 12 carbon atoms in the alkyl chain and ethanol amides of straight or branched aliphatic hydrocarbons with at least 12 carbon atoms in the hydrocarbon chain.
  • the debonding tensides are added to the pulp before or on the wire in an acid environment, that is at pH values below 7.
  • the additives are transferred from cationic form into the anionic and nonionic form respectively (depending on the nature of the additives).
  • This increase of the pH value must be performed not to loose the intended effect of the additives on the fiberizing of the pulp and should therefore take place after a substantial reduction of the water content of the pulp.
  • the increase of the pH value can take place as follows:
  • Alkylene oxide derivatives of said amines are obtained by addition of ethylene oxide or ethylene oxide and a higher alkylene oxide containing 3-6 carbon atoms, wherein the higher alkylene oxide can be added before, together with or after the ethylene oxide.
  • the debonding agent was added to a 2.5% slurry of sulphate pulp fibres at pH 4.5. After stirring of the suspension for 10 minutes it was diluted to a fibre concentration of 0.5% and formed into sheets (dry basis weight 750 g/m 2 ) in a laboratory sheet mould.
  • test sheets One part of these test sheets (sample B) was pressed without a pH change to a dry content of 40%.
  • sample A As a comparison sheets (sample A) were prepared of sulphate pulp not containing a debonding agent.
  • test sheets were dried to a dry content of 93% after the pressing and were conditioned at 23°C and a relative humidity of 50%. They were then shredded to fluff on a spiked roller. The energy that was utilized for the shredding, the tearing power, was read. Fluff cushions with a diameter of 50 mm and a weight of 2 g were formed. They were pressed to a hight of 15 mm which was kept constant. The time required for water to be absorbed from the bottom of the cushion to its top, the absorption time, was measured. The results are given in Table 1.
  • the effect of the debonding agent appears in that the.tearing power has decreased from 400 kJ/kg (sample A) to about 330 kJ/kg (sample B) and the effect of the pH increase in that the absorption time has been reduced from 3.8 s (sample B) to 2.8 s (sample C), that is approximately the same value as for the untreated pulp (sample A).
  • the debonding agent was added to a 2.5% slurry of sulphate .pulp fibres at pH 5.5. After stirring the suspension for 10 minutes it was diluted to a 0.5% fibre concentration and formed into two sheets (dry basis weight 750 g/m 2 ).
  • sample D One part of the sheets (sample D) was pressed without a change of pH to a dry content of 40%.
  • sample E The remaining sheets (sample E) were pressed to a dry content of 30% and then the pH of the sheets was increased to 1.0 by spraying with, based on 1 g dry pulp, 10 g alkaline water, the sheets being arranged on a suction filter to draw off surplus water. These sheets were then pressed to a dry content of 40%.
  • a third fluff pulp sample (sample F) was prepared by adding the debonding agent at pH 11.0 to a 2.5% slurry of sulphate pulp fibres and stirring thereof for 10 minutes, dilution and sheet forming (dry basis weight 750 g/m 2 ) and pressing to a dry content of 40% without any change of pH.
  • test sheets were dried to a dry content 93% after the pressing and conditioned at 23 0 C and a relative humidity of 50%.
  • the samples D and F show that pH must be low in the 2.5% fibre slurry for a debonding effect to appear, that is the agent has to be in cationic form.
  • Sample E shows that the increase of pH can be performed in a pressed pulp without the debonding effect to be lost. At the same time the absorption time is considerably reduced.
  • the debonding agent being ethoxylated tallow fatty amine containing two oxyethylene groups and having the ability to be transferred from cationic to nonionic form when pH is increased, and the wetting agent being nonionic, a C 12 -C 14 alcohol adduct.
  • sample G One part of the sheets (sample G) was pressed to a dry content of 40% without changing pH.
  • sample H The remaining sheets (sample H) were pressed to a dry content of 30% and then the pH of the sheets was increased to 11.0 by spraying with, based on 1 g dry pulp, 10 g alkaline water, the sheet being arranged on a suction filter to draw. off surplus water. These sheets were then pressed to a dry content of 40%.
  • test sheets were dried to a dry content of 93% after pressing and were conditioned at 23°C and a relative humidity of 50%.
  • Sample H shows that the pH increase reduces the absorption time considerably without seriously increasing the tearing power.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hematology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Paper (AREA)
EP84850382A 1984-12-07 1984-12-07 Procédé de préparation d'une pâte duvet Ceased EP0184603A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP84850382A EP0184603A1 (fr) 1984-12-07 1984-12-07 Procédé de préparation d'une pâte duvet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84850382A EP0184603A1 (fr) 1984-12-07 1984-12-07 Procédé de préparation d'une pâte duvet

Publications (1)

Publication Number Publication Date
EP0184603A1 true EP0184603A1 (fr) 1986-06-18

Family

ID=8193137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84850382A Ceased EP0184603A1 (fr) 1984-12-07 1984-12-07 Procédé de préparation d'une pâte duvet

Country Status (1)

Country Link
EP (1) EP0184603A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005808A1 (fr) * 1988-11-17 1990-05-31 Sca Pulp Ab Produit en papier en forme de bande aisement defibre
US5749863A (en) * 1994-03-18 1998-05-12 The Procter & Gamble Company Fluid acquisition and distribution member for absorbent core
US5873979A (en) * 1994-03-18 1999-02-23 The Procter & Gamble Company Preparing individualized polycarboxylic acid crosslinked cellulosic fibers
WO2011017541A3 (fr) * 2009-08-05 2011-07-21 International Paper Company Composition contenant un métal trivalent cationique et un agent tensio-actif délieur, procédés de réalisation, et son utilisation pour améliorer la qualité de pâte défibrée
CN102472003A (zh) * 2009-08-05 2012-05-23 国际纸业公司 用于施加包含阳离子三价金属和解胶剂的组合物的方法以及由该方法制造的绒毛浆片材
WO2013081955A1 (fr) * 2011-12-01 2013-06-06 Buckman Laboratories International, Inc. Procédé et système de production de pâte commercialisée et produits associés
US8871059B2 (en) * 2012-02-16 2014-10-28 International Paper Company Methods and apparatus for forming fluff pulp sheets
US8871054B2 (en) 2010-07-22 2014-10-28 International Paper Company Process for preparing fluff pulp sheet with cationic dye and debonder surfactant
US8974636B2 (en) 2010-07-20 2015-03-10 International Paper Company Composition containing a multivalent cationic metal and amine-containing anti-static agent and methods of making and using
US10415190B2 (en) 2009-08-05 2019-09-17 International Paper Company Dry fluff pulp sheet additive
WO2019177826A1 (fr) * 2018-03-15 2019-09-19 Buckman Laboratories International, Inc. Procédé et système de production de pâte commercialisée et produits associés
CN110616592A (zh) * 2019-08-26 2019-12-27 南安市耶郞新材料科技有限公司 一种卫生巾内部垫芯层用针叶木提取物的绒毛浆生产设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617439A (en) * 1969-01-02 1971-11-02 Buckeye Cellulose Corp Process for improving comminution pulp sheets and resulting air-laid absorbent products
US3844880A (en) * 1971-01-21 1974-10-29 Scott Paper Co Sequential addition of a cationic debonder, resin and deposition aid to a cellulosic fibrous slurry
GB1407134A (en) * 1973-03-21 1975-09-24 Honshu Paper Co Ltd Quaternary imidazoline derivatives and their use as surface active compounds for pulp slurry
US3989586A (en) * 1973-05-11 1976-11-02 The Dow Chemical Company Absorbent paper products and method of preparation
US4270977A (en) * 1979-11-01 1981-06-02 Nl Industries, Inc. Process for preparing water sorptive products
WO1982000485A1 (en) * 1980-08-07 1982-02-18 Y Lim Method for producing a high quality,water absorbent,cellulosic sheet having high surface-perceived softness

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617439A (en) * 1969-01-02 1971-11-02 Buckeye Cellulose Corp Process for improving comminution pulp sheets and resulting air-laid absorbent products
US3844880A (en) * 1971-01-21 1974-10-29 Scott Paper Co Sequential addition of a cationic debonder, resin and deposition aid to a cellulosic fibrous slurry
GB1407134A (en) * 1973-03-21 1975-09-24 Honshu Paper Co Ltd Quaternary imidazoline derivatives and their use as surface active compounds for pulp slurry
US3989586A (en) * 1973-05-11 1976-11-02 The Dow Chemical Company Absorbent paper products and method of preparation
US4270977A (en) * 1979-11-01 1981-06-02 Nl Industries, Inc. Process for preparing water sorptive products
WO1982000485A1 (en) * 1980-08-07 1982-02-18 Y Lim Method for producing a high quality,water absorbent,cellulosic sheet having high surface-perceived softness

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ABSTRACT BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY, vol. 54, no. 10, April 1984, page 1221, abstract no. 11489, Appleton, Wisconsin, US; & JP - A - 83 41997 (OJI PAPER CO., LTD.) 11-03-1983 *

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005808A1 (fr) * 1988-11-17 1990-05-31 Sca Pulp Ab Produit en papier en forme de bande aisement defibre
AU626941B2 (en) * 1988-11-17 1992-08-13 Sca Pulp Ab Easily de-fibred web-shaped paper product
US5262005A (en) * 1988-11-17 1993-11-16 Sca Pulp Ab Easily defibered web-shaped paper product
US5749863A (en) * 1994-03-18 1998-05-12 The Procter & Gamble Company Fluid acquisition and distribution member for absorbent core
US5873979A (en) * 1994-03-18 1999-02-23 The Procter & Gamble Company Preparing individualized polycarboxylic acid crosslinked cellulosic fibers
RU2520433C2 (ru) * 2009-08-05 2014-06-27 Интернэшнл Пэйпа Кампани Состав, содержащий катионный трехвалентный металл и разрыхлитель, и способы их изготовления и использования для улучшения качества рыхлой целлюлозы
CN102472003A (zh) * 2009-08-05 2012-05-23 国际纸业公司 用于施加包含阳离子三价金属和解胶剂的组合物的方法以及由该方法制造的绒毛浆片材
US10513827B2 (en) 2009-08-05 2019-12-24 International Paper Company Composition containing a cationic trivalent metal and debonder and methods of making and using the same to enhance fluff pulp quality
CN105544266A (zh) * 2009-08-05 2016-05-04 国际纸业公司 包含阳离子三价金属和解胶剂的组合物及其制造方法和使用该组合物提高绒毛浆质量的方法
US10415190B2 (en) 2009-08-05 2019-09-17 International Paper Company Dry fluff pulp sheet additive
US10260201B2 (en) 2009-08-05 2019-04-16 International Paper Company Process for applying composition containing a cationic trivalent metal and debonder and fluff pulp sheet made from same
CN102472003B (zh) * 2009-08-05 2014-10-29 国际纸业公司 用于施加包含阳离子三价金属和解胶剂的组合物的方法以及由该方法制造的绒毛浆片材
CN104220671A (zh) * 2009-08-05 2014-12-17 国际纸业公司 包含阳离子三价金属和解胶剂的组合物及其制造方法和使用该组合物提高绒毛浆质量的方法
RU2610240C2 (ru) * 2009-08-05 2017-02-08 Интернэшнл Пэйпа Кампани Способ нанесения композиции, содержащей катионный трехвалентный металл и разрыхлитель, и лист рыхлой целлюлозы, изготовленный из нее
WO2011017541A3 (fr) * 2009-08-05 2011-07-21 International Paper Company Composition contenant un métal trivalent cationique et un agent tensio-actif délieur, procédés de réalisation, et son utilisation pour améliorer la qualité de pâte défibrée
CN104220671B (zh) * 2009-08-05 2016-01-20 国际纸业公司 包含阳离子三价金属和解胶剂的组合物及其制造方法和使用该组合物提高绒毛浆质量的方法
US9260820B2 (en) 2009-08-05 2016-02-16 International Paper Company Composition containing a cationic trivalent metal and debonder and methods of making and using the same to enhance fluff pulp quality
US8974636B2 (en) 2010-07-20 2015-03-10 International Paper Company Composition containing a multivalent cationic metal and amine-containing anti-static agent and methods of making and using
US8871054B2 (en) 2010-07-22 2014-10-28 International Paper Company Process for preparing fluff pulp sheet with cationic dye and debonder surfactant
US8916024B2 (en) 2011-12-01 2014-12-23 Buckman Laboratories International, Inc. Method and system for producing market pulp and products thereof
WO2013081955A1 (fr) * 2011-12-01 2013-06-06 Buckman Laboratories International, Inc. Procédé et système de production de pâte commercialisée et produits associés
US9347182B2 (en) 2012-02-16 2016-05-24 International Paper Company Methods and apparatus for forming fluff pulp sheets
US20170081802A1 (en) * 2012-02-16 2017-03-23 International Paper Company Methods and apparatus for forming fluff pulp sheets
US8871059B2 (en) * 2012-02-16 2014-10-28 International Paper Company Methods and apparatus for forming fluff pulp sheets
WO2019177826A1 (fr) * 2018-03-15 2019-09-19 Buckman Laboratories International, Inc. Procédé et système de production de pâte commercialisée et produits associés
CN111868328A (zh) * 2018-03-15 2020-10-30 巴克曼实验室国际公司 用于生产商品纸浆的方法和系统及其产品
CN110616592A (zh) * 2019-08-26 2019-12-27 南安市耶郞新材料科技有限公司 一种卫生巾内部垫芯层用针叶木提取物的绒毛浆生产设备
CN110616592B (zh) * 2019-08-26 2021-05-25 山东顺康卫生用品有限公司 一种卫生巾内部垫芯层用针叶木提取物的绒毛浆生产设备

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